(possibly via authorized_keys(5) restrictions), even when a
pseudo-terminal has been allocated for the session.  In other words,
only display the MOTD when the server starts the user's default shell.

those packets might have been enqueued by set_connect_fds()

Cisco SSH on 15.4(3)M2 or similar can't handle it.

rather than doing ~ expansion

Prepend DROPBEAR for scp.c

Fix warnings

Fix warnings

reqname, bindaddr, request_addr, desthost and orighost to be exhaustive.